Troup soil series

Troup soils cover 2,028,617 mapped acres, mostly in Georgia, Alabama and Florida. USDA rates shrink-swell a limit for houses without basements on 0% of that land, and a shallow water table a limit for basements on 0%.

It is the leading soil series by area in 9 of the counties and cities on this site, including Marion County, GA; Richmond County, GA; Aiken County, SC.

SSURGO survey versions to August 5, 2026 · series description revised 2016-05

of its land: shrink-swell limits houses without basements

of its land: a shallow water table limits basements

1.5%

median highest linear extensibility (6% and up is high)

22%

median highest clay content in the top 150 cm

USDA's description

The Troup series consists of very deep, somewhat excessively drained soils that formed in unconsolidated sandy and loamy marine sediments. Troup soils are on ridges and hillslopes. Slopes predominantly range from 0 to 15 percent but range to 45 percent. Mean annual temperature is about 17 degrees C (64 degrees F), and the mean annual precipitation is about 1320 millimeters (52 inches).

Source: USDA NRCS series description (OSD) for Troup, revised 2016-05. Read it.

Engineering properties

Mapped area (SSURGO)	2,028,617 acres
Shrink-swell limits houses without basements	0.0%
Shallow water table limits basements	0.0%
Very limited for septic absorption fields	12.3%
Most common drainage class	Somewhat excessively drained
Most common hydrologic soil group	A
Taxonomic class	Loamy, kaolinitic, thermic Grossarenic Kandiudults
Type location	Barbour County, Alabama. About 0.3 miles east of Nero Baptist Cemetery, down a meandering dirt trail, off of Martin Creek Road. Comer Topographic Quadrangle

Where Troup is mapped

State	Mapped acres
Georgia	625,143
Alabama	559,178
Florida	480,002
South Carolina	336,092
Mississippi	16,983
North Carolina	11,219

Places where Troup leads

Counties and cities where Troup covers more mapped land than any other series.

Place	Share of mapped land
Marion County, GA	29%
Richmond County, GA	26%
Aiken County, SC	24%
Henry County, AL	23%
Webster County, GA	23%
Glascock County, GA	19%
Santa Rosa County, FL	18%
Escambia County, FL	16%
Calhoun County, SC	12%

Other places where Troup is a main soil

Counties and cities where Troup is among the six soil series covering the most mapped land, but not the first. Share of the place's mapped land.

Counties

Sources

Shares and properties: USDA NRCS SSURGO via Soil Data Access, weighted by each component's share of its map units. Description: the USDA NRCS series description. How we count.